/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.queryengine.plan.statement.component;

import java.util.Comparator;

public enum Ordering {
  ASC,
  DESC;

  public Ordering reverse() {
    if (this == ASC) {
      return DESC;
    } else {
      return ASC;
    }
  }

  public boolean isAscending() {
    return this == ASC;
  }

  public Comparator<String> getStringComparator() {
    if (this == ASC) {
      return Comparator.naturalOrder();
    } else {
      return Comparator.reverseOrder();
    }
  }
}
